add testnet upgrade handler

app/app.go

@@ -71,6 +71,7 @@ import (
 	testnetV18alpha3 "github.com/CosmosContracts/juno/v21/app/upgrades/testnet/v18.0.0-alpha.3"
 	testnetV18alpha4 "github.com/CosmosContracts/juno/v21/app/upgrades/testnet/v18.0.0-alpha.4"
 	testnetV19alpha3 "github.com/CosmosContracts/juno/v21/app/upgrades/testnet/v19.0.0-alpha.3"
+	testnetV21alpha1 "github.com/CosmosContracts/juno/v21/app/upgrades/testnet/v21.0.0-alpha.1"
 	v10 "github.com/CosmosContracts/juno/v21/app/upgrades/v10"
 	v11 "github.com/CosmosContracts/juno/v21/app/upgrades/v11"
 	v12 "github.com/CosmosContracts/juno/v21/app/upgrades/v12"
@@ -109,7 +110,8 @@ var (
 		testnetV18alpha3.Upgrade,
 		testnetV18alpha4.Upgrade,
 		testnetV19alpha3.Upgrade,
-
+		testnetV21alpha1.Upgrade,
+
 		v10.Upgrade,
 		v11.Upgrade,
 		v12.Upgrade,

app/upgrades/testnet/v21.0.0-alpha.1/constants.go

@@ -0,0 +1,45 @@
+package v21
+
+import (
+	"fmt"
+
+	store "github.com/cosmos/cosmos-sdk/store/types"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/module"
+	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
+
+	"github.com/CosmosContracts/juno/v21/app/keepers"
+	"github.com/CosmosContracts/juno/v21/app/upgrades"
+)
+
+// UpgradeName defines the on-chain upgrade name for the upgrade.
+const UpgradeName = "v2100alpha1"
+
+var Upgrade = upgrades.Upgrade{
+	UpgradeName:          UpgradeName,
+	CreateUpgradeHandler: v2100Alpha1UpgradeHandler,
+	StoreUpgrades:        store.StoreUpgrades{},
+}
+
+func v2100Alpha1UpgradeHandler(
+	mm *module.Manager,
+	cfg module.Configurator,
+	k *keepers.AppKeepers,
+) upgradetypes.UpgradeHandler {
+	return func(ctx sdk.Context, _ upgradetypes.Plan, vm module.VersionMap) (module.VersionMap, error) {
+		logger := ctx.Logger().With("upgrade", UpgradeName)
+
+		nativeDenom := upgrades.GetChainsDenomToken(ctx.ChainID())
+		logger.Info(fmt.Sprintf("With native denom %s", nativeDenom))
+
+		// Run migrations
+		logger.Info(fmt.Sprintf("pre migrate version map: %v", vm))
+		versionMap, err := mm.RunMigrations(ctx, cfg, vm)
+		if err != nil {
+			return nil, err
+		}
+		logger.Info(fmt.Sprintf("post migrate version map: %v", versionMap))
+
+		return versionMap, err
+	}
+}

app/upgrades/testnet/v21.0.0-alpha.1/upgrade_test.go

@@ -0,0 +1,40 @@
+package v21_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+
+	"github.com/CosmosContracts/juno/v21/app/apptesting"
+	v19alpha3 "github.com/CosmosContracts/juno/v21/app/upgrades/testnet/v19.0.0-alpha.3"
+)
+
+type UpgradeTestSuite struct {
+	apptesting.KeeperTestHelper
+}
+
+func (s *UpgradeTestSuite) SetupTest() {
+	s.Setup()
+}
+
+func TestKeeperTestSuite(t *testing.T) {
+	suite.Run(t, new(UpgradeTestSuite))
+}
+
+// Ensures the test does not error out.
+func (s *UpgradeTestSuite) TestUpgrade() {
+	s.Setup()
+
+	preUpgradeChecks(s)
+
+	upgradeHeight := int64(5)
+	s.ConfirmUpgradeSucceeded(v19alpha3.UpgradeName, upgradeHeight)
+
+	postUpgradeChecks(s)
+}
+
+func preUpgradeChecks(_ *UpgradeTestSuite) {
+}
+
+func postUpgradeChecks(_ *UpgradeTestSuite) {
+}